It's a wonder-filled environment that covers seven-tenths of the Earth's surface, but one that few people get to see close up. 3his sprawling BBC documentary series, produced over five years, takes viewers around the world to explore this undersea kingdom and the varied and unusual creatures who call it home. All eight episodes of the series─"Ocean World," "Frozen Seas," "Open Ocean," "The Deep," "Seasonal Seas," "Coral Seas," "Tidal Seas," and "Coasts," as well as a wealth of special features─are included in a five-disc set. 6 1/2 hrs. total. Widescreen; Soundtrack: English; interviews; featurettes; photo gallery. 8 episodes on 5 discs. 6 1/2 hrs.